Humans play a leading role in the spread of invasive species. From accidental introductions, like Japanese stiltgrass (Microstegium vimineum), to intentional planting, like tree of heaven (Ailanthus altissima) and mimosa (Albizia julibrissin), we have done an exceptional job of transporting invaders all over the world. Our cars carry seeds and propagules along highways, our boats… [Read More]